use buildinfo for version information

.github/workflows/docker-ci.yml

@@ -14,16 +14,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      -
-        name: Find Git Tag
-        id: tagger
-        uses: jimschubert/query-tag-action@v2
-        with:
-          include: 'v*'
-          exclude: '*-rc*'
-          commit-ish: 'HEAD'
-          skip-unshallow: 'true'
-          abbrev: 7
       - name: Docker meta
         id: meta
         uses: docker/metadata-action@v5
@@ -59,4 +49,3 @@ jobs:
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          build-args: 'GIT_DESC=${{steps.tagger.outputs.tag}}'

Dockerfile

@@ -1,11 +1,9 @@
 FROM --platform=$BUILDPLATFORM golang:1 AS build
 
-ARG GIT_DESC=undefined
-
 WORKDIR /go/src/github.com/Snawoot/opera-proxy
 COPY . .
 ARG TARGETOS TARGETARCH
-RUN GOOS=$TARGETOS GOARCH=$TARGETARCH CGO_ENABLED=0 go build -a -tags netgo -ldflags '-s -w -extldflags "-static" -X main.version='"$GIT_DESC"
+RUN GOOS=$TARGETOS GOARCH=$TARGETARCH CGO_ENABLED=0 go build -a -tags netgo -ldflags '-s -w -extldflags "-static"'
 ADD https://curl.haxx.se/ca/cacert.pem /certs.crt
 RUN chmod 0644 /certs.crt
 

Makefile

@@ -1,9 +1,8 @@
 PROGNAME = opera-proxy
 OUTSUFFIX = bin/$(PROGNAME)
-VERSION := $(shell git describe)
 BUILDOPTS = -a -tags netgo -trimpath -asmflags -trimpath
-LDFLAGS = -ldflags '-s -w -extldflags "-static" -X main.version=$(VERSION)'
-LDFLAGS_NATIVE = -ldflags '-s -w -X main.version=$(VERSION)'
+LDFLAGS = -ldflags '-s -w -extldflags "-static"'
+LDFLAGS_NATIVE = -ldflags '-s -w'
 
 NDK_CC_ARM = $(abspath ../../ndk-toolchain-arm/bin/arm-linux-androideabi-gcc)
 NDK_CC_ARM64 = $(abspath ../../ndk-toolchain-arm64/bin/aarch64-linux-android21-clang)

main.go

@@ -16,6 +16,7 @@ import (
 	"net/http"
 	"net/url"
 	"os"
+	"runtime/debug"
 	"strconv"
 	"strings"
 	"time"
@@ -35,10 +36,6 @@ const (
 	PROXY_SUFFIX = "sec-tunnel.com"
 )
 
-var (
-	version = "undefined"
-)
-
 func perror(msg string) {
 	fmt.Fprintln(os.Stderr, "")
 	fmt.Fprintln(os.Stderr, msg)
@@ -209,7 +206,7 @@ func proxyFromURLWrapper(u *url.URL, next xproxy.Dialer) (xproxy.Dialer, error)
 func run() int {
 	args := parse_args()
 	if args.showVersion {
-		fmt.Println(version)
+		fmt.Println(version())
 		return 0
 	}
 
@@ -588,3 +585,11 @@ func retryPolicy(retries int, retryInterval time.Duration, logger *clog.CondLogg
 		return err
 	}
 }
+
+func version() string {
+	bi, ok := debug.ReadBuildInfo()
+	if !ok {
+		return "unknown"
+	}
+	return bi.Main.Version
+}